This page contains information regarding new Star Trek material, and thus may contain spoilers.
The Gagarin Radiation Belt was an area of space that surrounded the Loracus system. At one time, the radiation belt made travel to the system all but impossible until the system's primary star became relatively stable sometime prior to 2151. (ENT: "Strange New World")
In 2164, the Federation starship USS Franklin was on a survey mission in this belt when it disappeared. It was later theorized in an alternate reality 2263 by Captain James T. Kirk that the ship experienced a wormhole displacement to account for its remote distance, for the 22nd century, from Earth after the ship was discovered on the planet Altamid. (Star Trek Beyond)